Β ΕΠΙΠΕΔΟΥ
Practice guidelines for performance of the routine
mid-trimester fetal ultrasound scan
PDF 26
Appendix 1
Baseline fetal anomaly scan
Extended views
Guidance for the professional
Some pregnancies affected by aneuploidy will have sonographic markers, which are listed below, but many normal pregnancies will also have these features.
If you are scanning at 20 weeks it is very important to know what screening has already been undertaken in your population. If your population has already been screened using maternal age alone, or in combination with nuchal translucency measurement or serum screening, 50-80% of affected cases will already have been identified, and it is therefore much less likely that a sonographic marker will be linked to aneuploidy, most typically trisomy 21, than in an unscreened population.
ltrasound Checklist
Sonographic "markers" for aneuploidy
Choroid plexus cyst
Ventriculomegaly (> 10 mm at the atrium)
Echogenic bowel (equivalent to bone density)
Head shape
Nuchal pad (>5 mm at 20 weeks)
Cysterna magna
Cleft lip
Echogenic foci in heart
Dilated renal pelvis (> 5 mm AP)
Short femur/humerus
Talipes
Sandal gap
Clinodactyly
Clenched hand
Two vessel cord
Other risk factors
Maternal age (> 35 yrs)
Serum screening results
Nuchal translucency (10-14 week scan)
http://onlinelibrary.wiley.com/doi/10.1002/uog.8831/full
ΑΥΤΟ ΔΙΑΒΑΣΤΕΤΟ ΟΠΩΣΔΗΠΟΤΕ
A pictorial guide for the second trimester ultrasound